Just over two million customers will be hit with gas and electricity price rises from 6 December, after Scottish Power became the fourth of the big six energy firms to announce a price rise.
Just over three million customers will be hit with gas and electricity price rises from 1 December, after Npower became the third of the big six energy firms to announce a price rise.
Over seven million customers will be hit with gas and electricity price hikes from 15 November, after Scottish & Southern Energy (SSE) became the first of the big six energy firms to announce a price rise.
Household energy bills will be £240 higher each year by 2020 largely due to the mounting cost of Government green policies, energy giant Npower claims.
Britain's big six energy companies will face fines unless they open up the electricity market to competition from independent rivals, under proposals by Ofgem.
12 June 2013
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